WebKit/Source/bindings/modules/v8/V8BindingForModules.cpp in Blink, as used in Google Chrome before 53.0.2785.113, does not properly consider getter side effects during array key conversion, which allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted Indexed Database (aka IndexedDB) API calls.
https://security.gentoo.org/glsa/201610-09
https://googlechromereleases.blogspot.com/2016/09/stable-channel-update-for-desktop_13.html
https://codereview.chromium.org/2332003002
http://www.securitytracker.com/id/1036826
http://www.securityfocus.com/bid/92942